custom network gets reverted

[m-aboelenein]

Component

Settings/Network

Severity

• Major (Unable to proceed on a journey)

Summary

When a user enters a custom network in network settings the action is completed but is not persisted.

Reproduce steps

1. open network settings
2. choose testnet
3. paste the custom network url in the input field https://dev-oracle.dlc.link

Expected result

All the data fetching and transactions broadcasting should go through the provided network url

Actual result

The url is reverted to the default network url for mainnet and testnet

Remark

• Needs some edits on the core-lib as-well to allow custom networks for transactions broadcasting
  https://github.com/secretkeylabs/xverse-core/blob/69664b071dd64e227747db994fcc1e370683b05d/transactions/stx.ts#L75